Pressure gauge has low battery indicator and auto power off setting function Portable digital pressure gauge is made of durable ABS material for a long time Gas differential pressure meter is suitable for ventilation systems and air conditioning and can measure air pressure of one pipe or differential pressure of 2 pipes, has 11 selectable measurement units: kPa, psi, Pressure test manometer has differential pressure measurement and large backlit LCD dual display Pressure gauge tester is widely used for gas measurement, calibration and any troubleshooting of all gas pressure systems 1. Pressure range: 10 psi 2. Precision : 0.3% FSO (at 25 oC) 3. Repeatability: 0.2% (Max 0.5% FSO) 4. Linearity / hysteresis: 0.29% FSO 5 Response time: 0.5 seconds 6. Over range indicator: Hi 7. Lower range indicator: Lo 8. Working conditions : 0 to 50 oC (32 to 122 oF) 9. Storage conditions : -10 to 60 oC (14 to 140 oF) 10.Power supply: 9V battery 11.Dimension165 X 80 X 45mm 11.Weight: 220 g Quantity: 1 piece, black (Not including battery) Note: This does not include other things, the color is based on the first picture, and other pictures only show the effect Due to the differences between different monitors, the picture may not reflect the actual color of the item. Due to manual measurement. Please allow deviation. Thank you!